The 23-year-old Bosnia-Herzegovina international is Arsenal’s first official signing of the summer transfer window, and is set to head to the Emirates on July 1 when his deal at Schalke expires.

Many fans noted that their new left-back could potentially push 27-year-old Kieran Gibbs out of the squad and others pointed out that he represented excellent business given that Arsenal are only shelling out for his wages and no transfer fee.

This is Futbol has rounded up some of the best Twitter reactions:

Think Mendy, Kurzawa and Ghoulam are pretty much unattainable based on the fees this summer. Kolasinac excellent business